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/cvs/Coro/Coro/State.xs

Comparing Coro/Coro/State.xs (file contents):
Revision 1.118 by root, Fri Dec 1 19:58:53 2006 UTC vs.
Revision 1.209 by root, Wed Oct 10 02:58:17 2007 UTC

1	#include "libcoro/coro.c"	1	#include "libcoro/coro.c"
		2
		3	#define PERL_NO_GET_CONTEXT
		4	#define PERL_EXT
2		5
3	#include "EXTERN.h"	6	#include "EXTERN.h"
4	#include "perl.h"	7	#include "perl.h"
5	#include "XSUB.h"	8	#include "XSUB.h"
6		9
7	#include "patchlevel.h"	10	#include "patchlevel.h"
8		11
9	#if USE_VALGRIND
10	# include <valgrind/valgrind.h>
11	#endif
12
13	/* the maximum number of idle cctx that will be pooled */
14	#define MAX_IDLE_CCTX 8
15
16	#define PERL_VERSION_ATLEAST(a,b,c) \
17	(PERL_REVISION > (a) \
18	|| (PERL_REVISION == (a) \
19	&& (PERL_VERSION > (b) \
20	|| (PERL_VERSION == (b) && PERLSUBVERSION >= (c)))))
21
22	#if !PERL_VERSION_ATLEAST (5,6,0)
23	# ifndef PL_ppaddr
24	# define PL_ppaddr ppaddr
25	# endif
26	# ifndef call_sv
27	# define call_sv perl_call_sv
28	# endif
29	# ifndef get_sv
30	# define get_sv perl_get_sv
31	# endif
32	# ifndef get_cv
33	# define get_cv perl_get_cv
34	# endif
35	# ifndef IS_PADGV
36	# define IS_PADGV(v) 0
37	# endif
38	# ifndef IS_PADCONST
39	# define IS_PADCONST(v) 0
40	# endif
41	#endif
42
43	#include <stdio.h>	12	#include <stdio.h>
44	#include <errno.h>	13	#include <errno.h>
45		14	#include <assert.h>
46	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64	15	#include <inttypes.h> /* portable stdint.h */
47	# undef STACKGUARD
48	#endif
49
50	#ifndef STACKGUARD
51	# define STACKGUARD 0
52	#endif
53		16
54	#ifdef HAVE_MMAP	17	#ifdef HAVE_MMAP
55	# include <unistd.h>	18	# include <unistd.h>
56	# include <sys/mman.h>	19	# include <sys/mman.h>
57	# ifndef MAP_ANONYMOUS	20	# ifndef MAP_ANONYMOUS
…		…
72	#else	35	#else
73	# define PAGESIZE 0	36	# define PAGESIZE 0
74	# define BOOT_PAGESIZE (void)0	37	# define BOOT_PAGESIZE (void)0
75	#endif	38	#endif
76		39
77	/* The next macro should declare a variable stacklevel that contains and approximation	40	#if CORO_USE_VALGRIND
78	* to the current C stack pointer. Its property is that it changes with each call	41	# include <valgrind/valgrind.h>
79	* and should be unique. */	42	# define REGISTER_STACK(cctx,start,end) (cctx)->valgrind_id = VALGRIND_STACK_REGISTER ((start), (end))
		43	#else
		44	# define REGISTER_STACK(cctx,start,end)
		45	#endif
		46
		47	/* the maximum number of idle cctx that will be pooled */
		48	#define MAX_IDLE_CCTX 8
		49
		50	#define PERL_VERSION_ATLEAST(a,b,c) \
		51	(PERL_REVISION > (a) \
		52	|| (PERL_REVISION == (a) \
		53	&& (PERL_VERSION > (b) \
		54	|| (PERL_VERSION == (b) && PERLSUBVERSION >= (c)))))
		55
		56	#if !PERL_VERSION_ATLEAST (5,6,0)
		57	# ifndef PL_ppaddr
		58	# define PL_ppaddr ppaddr
		59	# endif
		60	# ifndef call_sv
		61	# define call_sv perl_call_sv
		62	# endif
		63	# ifndef get_sv
		64	# define get_sv perl_get_sv
		65	# endif
		66	# ifndef get_cv
		67	# define get_cv perl_get_cv
		68	# endif
		69	# ifndef IS_PADGV
		70	# define IS_PADGV(v) 0
		71	# endif
		72	# ifndef IS_PADCONST
		73	# define IS_PADCONST(v) 0
		74	# endif
		75	#endif
		76
		77	/* 5.8.7 */
		78	#ifndef SvRV_set
		79	# define SvRV_set(s,v) SvRV(s) = (v)
		80	#endif
		81
		82	/* 5.8.8 */
		83	#ifndef GV_NOTQUAL
		84	# define GV_NOTQUAL 0
		85	#endif
		86	#ifndef newSV
		87	# define newSV(l) NEWSV(0,l)
		88	#endif
		89
		90	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
		91	# undef CORO_STACKGUARD
		92	#endif
		93
		94	#ifndef CORO_STACKGUARD
		95	# define CORO_STACKGUARD 0
		96	#endif
		97
		98	/* prefer perl internal functions over our own? */
		99	#ifndef CORO_PREFER_PERL_FUNCTIONS
		100	# define CORO_PREFER_PERL_FUNCTIONS 0
		101	#endif
		102
		103	/* The next macros try to return the current stack pointer, in an as
		104	* portable way as possible. */
80	#define dSTACKLEVEL int stacklevel	105	#define dSTACKLEVEL volatile char stacklevel
81	#define STACKLEVEL ((void *)&stacklevel)	106	#define STACKLEVEL ((void *)&stacklevel)
82		107
83	#define IN_DESTRUCT (PL_main_cv == Nullcv)	108	#define IN_DESTRUCT (PL_main_cv == Nullcv)
84		109
85	#if __GNUC__ >= 3	110	#if __GNUC__ >= 3
86	# define attribute(x) __attribute__(x)	111	# define attribute(x) __attribute__(x)
		112	# define BARRIER __asm__ __volatile__ ("" : : : "memory")
		113	# define expect(expr,value) __builtin_expect ((expr),(value))
87	#else	114	#else
88	# define attribute(x)	115	# define attribute(x)
		116	# define BARRIER
		117	# define expect(expr,value) (expr)
89	#endif	118	#endif
		119
		120	#define expect_false(expr) expect ((expr) != 0, 0)
		121	#define expect_true(expr) expect ((expr) != 0, 1)
90		122
91	#define NOINLINE attribute ((noinline))	123	#define NOINLINE attribute ((noinline))
92		124
93	#include "CoroAPI.h"	125	#include "CoroAPI.h"
94
95	#define TRANSFER_SET_STACKLEVEL 0x8bfbfbfb /* magic cookie */
96		126
97	#ifdef USE_ITHREADS	127	#ifdef USE_ITHREADS
98	static perl_mutex coro_mutex;	128	static perl_mutex coro_mutex;
99	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)	129	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)
100	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)	130	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
101	#else	131	#else
102	# define LOCK (void)0	132	# define LOCK (void)0
103	# define UNLOCK (void)0	133	# define UNLOCK (void)0
104	#endif	134	#endif
105		135
		136	#define strpair(const) const, sizeof (const) - 1
		137
		138	/* helper storage struct for Coro::AIO */
		139	struct io_state
		140	{
		141	int errorno;
		142	I32 laststype;
		143	int laststatval;
		144	Stat_t statcache;
		145	};
		146
		147	static size_t coro_stacksize = CORO_STACKSIZE;
106	static struct CoroAPI coroapi;	148	static struct CoroAPI coroapi;
107	static AV *main_mainstack; /* used to differentiate between $main and others */	149	static AV *main_mainstack; /* used to differentiate between $main and others */
		150	static JMPENV *main_top_env;
108	static HV *coro_state_stash, *coro_stash;	151	static HV *coro_state_stash, *coro_stash;
109	static SV *coro_mortal; /* will be freed after next transfer */	152	static SV *coro_mortal; /* will be freed after next transfer */
110		153
111	static struct coro_cctx *cctx_first;	154	static GV *irsgv; /* $/ */
		155	static GV *stdoutgv; /* *STDOUT */
		156
		157	static HV *hv_sig; /* %SIG */
		158	static SV *sv_diehook;
		159	static SV *sv_warnhook;
		160
		161	/* async_pool helper stuff */
		162	static SV *sv_pool_rss;
		163	static SV *sv_pool_size;
		164	static AV *av_async_pool;
		165
		166	static struct coro_cctx *cctx_first[3]; /* index by GIMME_V type, void, scalar, array */
112	static int cctx_count, cctx_idle;	167	static int cctx_count, cctx_idle[3];
		168
		169	enum {
		170	CC_MAPPED = 0x01,
		171	CC_NOREUSE = 0x02, /* throw this away after tracing */
		172	CC_TRACE = 0x04,
		173	CC_TRACE_SUB = 0x08, /* trace sub calls */
		174	CC_TRACE_LINE = 0x10, /* trace each statement */
		175	CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
		176	};
113		177
114	/* this is a structure representing a c-level coroutine */	178	/* this is a structure representing a c-level coroutine */
115	typedef struct coro_cctx {	179	typedef struct coro_cctx {
116	struct coro_cctx *next;	180	struct coro_cctx *next;
117		181
118	/* the stack */	182	/* the stack */
119	void *sptr;	183	void *sptr;
120	long ssize; /* positive == mmap, otherwise malloc */	184	size_t ssize;
121		185
122	/* cpu state */	186	/* cpu state */
123	void *idle_sp; /* sp of top-level transfer/schedule/cede call */	187	void *idle_sp; /* sp of top-level transfer/schedule/cede call */
		188	JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
124	JMPENV *top_env;	189	JMPENV *top_env;
125	coro_context cctx;	190	coro_context cctx;
126		191
127	int inuse;
128
129	#if USE_VALGRIND	192	#if CORO_USE_VALGRIND
130	int valgrind_id;	193	int valgrind_id;
131	#endif	194	#endif
		195	unsigned char flags;
132	} coro_cctx;	196	} coro_cctx;
133		197
134	enum {	198	enum {
135	CF_RUNNING = 0x0001, /* coroutine is running */	199	CF_RUNNING = 0x0001, /* coroutine is running */
136	CF_READY = 0x0002, /* coroutine is ready */	200	CF_READY = 0x0002, /* coroutine is ready */
137	CF_NEW = 0x0004, /* ahs never been switched to */	201	CF_NEW = 0x0004, /* has never been switched to */
		202	CF_DESTROYED = 0x0008, /* coroutine data has been freed */
138	};	203	};
		204
		205	/* the structure where most of the perl state is stored, overlaid on the cxstack */
		206	typedef struct {
		207	SV *defsv;
		208	AV *defav;
		209	SV *errsv;
		210	SV *irsgv;
		211	#define VAR(name,type) type name;
		212	# include "state.h"
		213	#undef VAR
		214	} perl_slots;
		215
		216	#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
139		217
140	/* this is a structure representing a perl-level coroutine */	218	/* this is a structure representing a perl-level coroutine */
141	struct coro {	219	struct coro {
142	/* the c coroutine allocated to this perl coroutine, if any */	220	/* the c coroutine allocated to this perl coroutine, if any */
143	coro_cctx *cctx;	221	coro_cctx *cctx;
		222	int gimme;
144		223
		224	/* process data */
		225	AV *mainstack;
		226	perl_slots *slot; /* basically the saved sp */
		227
145	/* data associated with this coroutine (initial args) */	228	AV *args; /* data associated with this coroutine (initial args) */
146	AV *args;	229	int refcnt; /* coroutines are refcounted, yes */
147	int refcnt;	230	int flags; /* CF_ flags */
148	int flags;	231	HV *hv; /* the perl hash associated with this coro, if any */
149		232
150	/* optionally saved, might be zero */	233	/* statistics */
151	AV *defav;	234	int usecount; /* number of transfers to this coro */
152	SV *defsv;
153	SV *errsv;
154
155	#define VAR(name,type) type name;
156	# include "state.h"
157	#undef VAR
158		235
159	/* coro process data */	236	/* coro process data */
160	int prio;	237	int prio;
		238	SV *throw; /* exception to be thrown */
		239
		240	/* async_pool */
		241	SV *saved_deffh;
		242
		243	/* linked list */
		244	struct coro *next, *prev;
161	};	245	};
162		246
163	typedef struct coro *Coro__State;	247	typedef struct coro *Coro__State;
164	typedef struct coro *Coro__State_or_hashref;	248	typedef struct coro *Coro__State_or_hashref;
165		249
		250	/** Coro ********************************************************************/
		251
		252	#define PRIO_MAX 3
		253	#define PRIO_HIGH 1
		254	#define PRIO_NORMAL 0
		255	#define PRIO_LOW -1
		256	#define PRIO_IDLE -3
		257	#define PRIO_MIN -4
		258
		259	/* for Coro.pm */
		260	static SV *coro_current;
		261	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
		262	static int coro_nready;
		263	static struct coro *coro_first;
		264
		265	/** lowlevel stuff **********************************************************/
		266
		267	static SV *
		268	coro_get_sv (const char *name, int create)
		269	{
		270	#if PERL_VERSION_ATLEAST (5,9,0)
		271	/* silence stupid and wrong 5.10 warning that I am unable to switch off */
		272	get_sv (name, create);
		273	#endif
		274	return get_sv (name, create);
		275	}
		276
166	static AV *	277	static AV *
		278	coro_get_av (const char *name, int create)
		279	{
		280	#if PERL_VERSION_ATLEAST (5,9,0)
		281	/* silence stupid and wrong 5.10 warning that I am unable to switch off */
		282	get_av (name, create);
		283	#endif
		284	return get_av (name, create);
		285	}
		286
		287	static HV *
		288	coro_get_hv (const char *name, int create)
		289	{
		290	#if PERL_VERSION_ATLEAST (5,9,0)
		291	/* silence stupid and wrong 5.10 warning that I am unable to switch off */
		292	get_hv (name, create);
		293	#endif
		294	return get_hv (name, create);
		295	}
		296
		297	static AV *
167	coro_clone_padlist (CV *cv)	298	coro_clone_padlist (pTHX_ CV *cv)
168	{	299	{
169	AV *padlist = CvPADLIST (cv);	300	AV *padlist = CvPADLIST (cv);
170	AV *newpadlist, *newpad;	301	AV *newpadlist, *newpad;
171		302
172	newpadlist = newAV ();	303	newpadlist = newAV ();
…		…
184		315
185	return newpadlist;	316	return newpadlist;
186	}	317	}
187		318
188	static void	319	static void
189	free_padlist (AV *padlist)	320	free_padlist (pTHX_ AV *padlist)
190	{	321	{
191	/* may be during global destruction */	322	/* may be during global destruction */
192	if (SvREFCNT (padlist))	323	if (SvREFCNT (padlist))
193	{	324	{
194	I32 i = AvFILLp (padlist);	325	I32 i = AvFILLp (padlist);
…		…
215	AV *padlist;	346	AV *padlist;
216	AV *av = (AV *)mg->mg_obj;	347	AV *av = (AV *)mg->mg_obj;
217		348
218	/* casting is fun. */	349	/* casting is fun. */
219	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))	350	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
220	free_padlist (padlist);	351	free_padlist (aTHX_ padlist);
221		352
222	SvREFCNT_dec (av);	353	SvREFCNT_dec (av);
223		354
224	return 0;	355	return 0;
225	}	356	}
…		…
233	? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \	364	? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \
234	? SvMAGIC (cv) \	365	? SvMAGIC (cv) \
235	: mg_find ((SV *)cv, PERL_MAGIC_coro) \	366	: mg_find ((SV *)cv, PERL_MAGIC_coro) \
236	: 0	367	: 0
237		368
		369	static struct coro *
		370	SvSTATE_ (pTHX_ SV *coro)
		371	{
		372	HV *stash;
		373	MAGIC *mg;
		374
		375	if (SvROK (coro))
		376	coro = SvRV (coro);
		377
		378	if (expect_false (SvTYPE (coro) != SVt_PVHV))
		379	croak ("Coro::State object required");
		380
		381	stash = SvSTASH (coro);
		382	if (expect_false (stash != coro_stash && stash != coro_state_stash))
		383	{
		384	/* very slow, but rare, check */
		385	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
		386	croak ("Coro::State object required");
		387	}
		388
		389	mg = CORO_MAGIC (coro);
		390	return (struct coro *)mg->mg_ptr;
		391	}
		392
		393	#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
		394
238	/* the next two functions merely cache the padlists */	395	/* the next two functions merely cache the padlists */
239	static void	396	static void
240	get_padlist (CV *cv)	397	get_padlist (pTHX_ CV *cv)
241	{	398	{
242	MAGIC *mg = CORO_MAGIC (cv);	399	MAGIC *mg = CORO_MAGIC (cv);
243	AV *av;	400	AV *av;
244		401
245	if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)	402	if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
246	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];	403	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
247	else	404	else
248	{	405	{
249	#if 0	406	#if CORO_PREFER_PERL_FUNCTIONS
250	/* this is probably cleaner, but also slower? */	407	/* this is probably cleaner, but also slower? */
251	CV *cp = Perl_cv_clone (cv);	408	CV *cp = Perl_cv_clone (cv);
252	CvPADLIST (cv) = CvPADLIST (cp);	409	CvPADLIST (cv) = CvPADLIST (cp);
253	CvPADLIST (cp) = 0;	410	CvPADLIST (cp) = 0;
254	SvREFCNT_dec (cp);	411	SvREFCNT_dec (cp);
255	#else	412	#else
256	CvPADLIST (cv) = coro_clone_padlist (cv);	413	CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
257	#endif	414	#endif
258	}	415	}
259	}	416	}
260		417
261	static void	418	static void
262	put_padlist (CV *cv)	419	put_padlist (pTHX_ CV *cv)
263	{	420	{
264	MAGIC *mg = CORO_MAGIC (cv);	421	MAGIC *mg = CORO_MAGIC (cv);
265	AV *av;	422	AV *av;
266		423
267	if (!mg)	424	if (expect_false (!mg))
268	{	425	{
269	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);	426	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
270	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	427	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
271	mg->mg_virtual = &vtbl_coro;	428	mg->mg_virtual = &vtbl_coro;
272	mg->mg_obj = (SV *)newAV ();	429	mg->mg_obj = (SV *)newAV ();
273	}	430	}
274		431
275	av = (AV *)mg->mg_obj;	432	av = (AV *)mg->mg_obj;
276		433
277	if (AvFILLp (av) >= AvMAX (av))	434	if (expect_false (AvFILLp (av) >= AvMAX (av)))
278	av_extend (av, AvMAX (av) + 1);	435	av_extend (av, AvMAX (av) + 1);
279		436
280	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);	437	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
281	}	438	}
282		439
283	#define SB do {	440	/** load & save, init *******************************************************/
284	#define SE } while (0)
285
286	#define LOAD(state) load_state ((state))
287	#define SAVE(state,flags) save_state ((state),(flags))
288
289	#define REPLACE_SV(sv,val) SB SvREFCNT_dec (sv); (sv) = (val); (val) = 0; SE
290		441
291	static void	442	static void
292	load_state (Coro__State c)	443	load_perl (pTHX_ Coro__State c)
293	{	444	{
		445	perl_slots *slot = c->slot;
		446	c->slot = 0;
		447
		448	PL_mainstack = c->mainstack;
		449
		450	GvSV (PL_defgv) = slot->defsv;
		451	GvAV (PL_defgv) = slot->defav;
		452	GvSV (PL_errgv) = slot->errsv;
		453	GvSV (irsgv) = slot->irsgv;
		454
294	#define VAR(name,type) PL_ ## name = c->name;	455	#define VAR(name,type) PL_ ## name = slot->name;
295	# include "state.h"	456	# include "state.h"
296	#undef VAR	457	#undef VAR
297		458
298	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);	459	/*hv_store (hv_sig, strpair ("__DIE__" ), SvREFCNT_inc (sv_diehook ), 0);*/
299	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);	460	/*hv_store (hv_sig, strpair ("__WARN__"), SvREFCNT_inc (sv_warnhook), 0);*/
300	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
301		461
302	{	462	{
303	dSP;	463	dSP;
		464
304	CV *cv;	465	CV *cv;
305		466
306	/* now do the ugly restore mess */	467	/* now do the ugly restore mess */
307	while ((cv = (CV *)POPs))	468	while (expect_true (cv = (CV *)POPs))
308	{	469	{
309	put_padlist (cv); /* mark this padlist as available */	470	put_padlist (aTHX_ cv); /* mark this padlist as available */
310	CvDEPTH (cv) = PTR2IV (POPs);	471	CvDEPTH (cv) = PTR2IV (POPs);
311	CvPADLIST (cv) = (AV *)POPs;	472	CvPADLIST (cv) = (AV *)POPs;
312	}	473	}
313		474
314	PUTBACK;	475	PUTBACK;
315	}	476	}
316	}	477	}
317		478
318	static void	479	static void
319	save_state (Coro__State c, int flags)	480	save_perl (pTHX_ Coro__State c)
320	{	481	{
321	{	482	{
322	dSP;	483	dSP;
323	I32 cxix = cxstack_ix;	484	I32 cxix = cxstack_ix;
324	PERL_CONTEXT *ccstk = cxstack;	485	PERL_CONTEXT *ccstk = cxstack;
…		…
327	/*	488	/*
328	* the worst thing you can imagine happens first - we have to save	489	* the worst thing you can imagine happens first - we have to save
329	* (and reinitialize) all cv's in the whole callchain :(	490	* (and reinitialize) all cv's in the whole callchain :(
330	*/	491	*/
331		492
332	PUSHs (Nullsv);	493	XPUSHs (Nullsv);
333	/* this loop was inspired by pp_caller */	494	/* this loop was inspired by pp_caller */
334	for (;;)	495	for (;;)
335	{	496	{
336	while (cxix >= 0)	497	while (expect_true (cxix >= 0))
337	{	498	{
338	PERL_CONTEXT *cx = &ccstk[cxix--];	499	PERL_CONTEXT *cx = &ccstk[cxix--];
339		500
340	if (CxTYPE (cx) == CXt_SUB)	501	if (expect_true (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT))
341	{	502	{
342	CV *cv = cx->blk_sub.cv;	503	CV *cv = cx->blk_sub.cv;
343		504
344	if (CvDEPTH (cv))	505	if (expect_true (CvDEPTH (cv)))
345	{	506	{
346	EXTEND (SP, 3);	507	EXTEND (SP, 3);
347
348	PUSHs ((SV *)CvPADLIST (cv));	508	PUSHs ((SV *)CvPADLIST (cv));
349	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));	509	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
350	PUSHs ((SV *)cv);	510	PUSHs ((SV *)cv);
351		511
352	CvDEPTH (cv) = 0;	512	CvDEPTH (cv) = 0;
353	get_padlist (cv);	513	get_padlist (aTHX_ cv);
354	}	514	}
355	}	515	}
356	#ifdef CXt_FORMAT
357	else if (CxTYPE (cx) == CXt_FORMAT)
358	{
359	/* I never used formats, so how should I know how these are implemented? */
360	/* my bold guess is as a simple, plain sub... */
361	croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
362	}
363	#endif
364	}	516	}
365		517
366	if (top_si->si_type == PERLSI_MAIN)	518	if (expect_true (top_si->si_type == PERLSI_MAIN))
367	break;	519	break;
368		520
369	top_si = top_si->si_prev;	521	top_si = top_si->si_prev;
370	ccstk = top_si->si_cxstack;	522	ccstk = top_si->si_cxstack;
371	cxix = top_si->si_cxix;	523	cxix = top_si->si_cxix;
372	}	524	}
373		525
374	PUTBACK;	526	PUTBACK;
375	}	527	}
376		528
377	c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;	529	/* allocate some space on the context stack for our purposes */
378	c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;	530	/* we manually unroll here, as usually 2 slots is enough */
379	c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;	531	if (SLOT_COUNT >= 1) CXINC;
		532	if (SLOT_COUNT >= 2) CXINC;
		533	if (SLOT_COUNT >= 3) CXINC;
		534	{
		535	int i;
		536	for (i = 3; i < SLOT_COUNT; ++i)
		537	CXINC;
		538	}
		539	cxstack_ix -= SLOT_COUNT; /* undo allocation */
380		540
		541	c->mainstack = PL_mainstack;
		542
		543	{
		544	perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
		545
		546	slot->defav = GvAV (PL_defgv);
		547	slot->defsv = DEFSV;
		548	slot->errsv = ERRSV;
		549	slot->irsgv = GvSV (irsgv);
		550
381	#define VAR(name,type)c->name = PL_ ## name;	551	#define VAR(name,type) slot->name = PL_ ## name;
382	# include "state.h"	552	# include "state.h"
383	#undef VAR	553	#undef VAR
		554	}
384	}	555	}
385		556
386	/*	557	/*
387	* allocate various perl stacks. This is an exact copy	558	* allocate various perl stacks. This is an exact copy
388	* of perl.c:init_stacks, except that it uses less memory	559	* of perl.c:init_stacks, except that it uses less memory
389	* on the (sometimes correct) assumption that coroutines do	560	* on the (sometimes correct) assumption that coroutines do
390	* not usually need a lot of stackspace.	561	* not usually need a lot of stackspace.
391	*/	562	*/
		563	#if CORO_PREFER_PERL_FUNCTIONS
		564	# define coro_init_stacks init_stacks
		565	#else
392	static void	566	static void
393	coro_init_stacks ()	567	coro_init_stacks (pTHX)
394	{	568	{
395	PL_curstackinfo = new_stackinfo(128, 1024/sizeof(PERL_CONTEXT));	569	PL_curstackinfo = new_stackinfo(32, 8);
396	PL_curstackinfo->si_type = PERLSI_MAIN;	570	PL_curstackinfo->si_type = PERLSI_MAIN;
397	PL_curstack = PL_curstackinfo->si_stack;	571	PL_curstack = PL_curstackinfo->si_stack;
398	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	572	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
399		573
400	PL_stack_base = AvARRAY(PL_curstack);	574	PL_stack_base = AvARRAY(PL_curstack);
401	PL_stack_sp = PL_stack_base;	575	PL_stack_sp = PL_stack_base;
402	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);	576	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
403		577
404	New(50,PL_tmps_stack,128,SV*);	578	New(50,PL_tmps_stack,32,SV*);
405	PL_tmps_floor = -1;	579	PL_tmps_floor = -1;
406	PL_tmps_ix = -1;	580	PL_tmps_ix = -1;
407	PL_tmps_max = 128;	581	PL_tmps_max = 32;
408		582
409	New(54,PL_markstack,32,I32);	583	New(54,PL_markstack,16,I32);
410	PL_markstack_ptr = PL_markstack;	584	PL_markstack_ptr = PL_markstack;
411	PL_markstack_max = PL_markstack + 32;	585	PL_markstack_max = PL_markstack + 16;
412		586
413	#ifdef SET_MARK_OFFSET	587	#ifdef SET_MARK_OFFSET
414	SET_MARK_OFFSET;	588	SET_MARK_OFFSET;
415	#endif	589	#endif
416		590
417	New(54,PL_scopestack,32,I32);	591	New(54,PL_scopestack,8,I32);
418	PL_scopestack_ix = 0;	592	PL_scopestack_ix = 0;
419	PL_scopestack_max = 32;	593	PL_scopestack_max = 8;
420		594
421	New(54,PL_savestack,64,ANY);	595	New(54,PL_savestack,24,ANY);
422	PL_savestack_ix = 0;	596	PL_savestack_ix = 0;
423	PL_savestack_max = 64;	597	PL_savestack_max = 24;
424		598
425	#if !PERL_VERSION_ATLEAST (5,9,0)	599	#if !PERL_VERSION_ATLEAST (5,9,0)
426	New(54,PL_retstack,16,OP*);	600	New(54,PL_retstack,4,OP*);
427	PL_retstack_ix = 0;	601	PL_retstack_ix = 0;
428	PL_retstack_max = 16;	602	PL_retstack_max = 4;
429	#endif	603	#endif
430	}	604	}
		605	#endif
431		606
432	/*	607	/*
433	* destroy the stacks, the callchain etc...	608	* destroy the stacks, the callchain etc...
434	*/	609	*/
435	static void	610	static void
436	coro_destroy_stacks ()	611	coro_destroy_stacks (pTHX)
437	{	612	{
438	if (!IN_DESTRUCT)
439	{
440	/* is this ugly, I ask? */
441	LEAVE_SCOPE (0);
442
443	/* sure it is, but more important: is it correct?? :/ */
444	FREETMPS;
445
446	/*POPSTACK_TO (PL_mainstack);*//*D*//*use*/
447	}
448
449	while (PL_curstackinfo->si_next)	613	while (PL_curstackinfo->si_next)
450	PL_curstackinfo = PL_curstackinfo->si_next;	614	PL_curstackinfo = PL_curstackinfo->si_next;
451		615
452	while (PL_curstackinfo)	616	while (PL_curstackinfo)
453	{	617	{
454	PERL_SI *p = PL_curstackinfo->si_prev;	618	PERL_SI *p = PL_curstackinfo->si_prev;
455		619
456	{ /*D*//*remove*/
457	dSP;
458	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
459	PUTBACK; /* possibly superfluous */
460	}
461
462	if (!IN_DESTRUCT)	620	if (!IN_DESTRUCT)
463	{
464	dounwind (-1);/*D*//*remove*/
465	SvREFCNT_dec (PL_curstackinfo->si_stack);	621	SvREFCNT_dec (PL_curstackinfo->si_stack);
466	}
467		622
468	Safefree (PL_curstackinfo->si_cxstack);	623	Safefree (PL_curstackinfo->si_cxstack);
469	Safefree (PL_curstackinfo);	624	Safefree (PL_curstackinfo);
470	PL_curstackinfo = p;	625	PL_curstackinfo = p;
471	}	626	}
…		…
477	#if !PERL_VERSION_ATLEAST (5,9,0)	632	#if !PERL_VERSION_ATLEAST (5,9,0)
478	Safefree (PL_retstack);	633	Safefree (PL_retstack);
479	#endif	634	#endif
480	}	635	}
481		636
		637	static size_t
		638	coro_rss (pTHX_ struct coro *coro)
		639	{
		640	size_t rss = sizeof (*coro);
		641
		642	if (coro->mainstack)
		643	{
		644	perl_slots tmp_slot;
		645	perl_slots *slot;
		646
		647	if (coro->flags & CF_RUNNING)
		648	{
		649	slot = &tmp_slot;
		650
		651	#define VAR(name,type) slot->name = PL_ ## name;
		652	# include "state.h"
		653	#undef VAR
		654	}
		655	else
		656	slot = coro->slot;
		657
		658	rss += sizeof (slot->curstackinfo);
		659	rss += (slot->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT);
		660	rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (slot->curstack)) * sizeof (SV *);
		661	rss += slot->tmps_max * sizeof (SV *);
		662	rss += (slot->markstack_max - slot->markstack_ptr) * sizeof (I32);
		663	rss += slot->scopestack_max * sizeof (I32);
		664	rss += slot->savestack_max * sizeof (ANY);
		665
		666	#if !PERL_VERSION_ATLEAST (5,9,0)
		667	rss += slot->retstack_max * sizeof (OP *);
		668	#endif
		669	}
		670
		671	return rss;
		672	}
		673
		674	/** coroutine stack handling ************************************************/
		675
482	static void	676	static void
483	setup_coro (struct coro *coro)	677	coro_setup (pTHX_ struct coro *coro)
484	{	678	{
485	/*	679	/*
486	* emulate part of the perl startup here.	680	* emulate part of the perl startup here.
487	*/	681	*/
488
489	coro_init_stacks ();	682	coro_init_stacks (aTHX);
490		683
		684	PL_runops = RUNOPS_DEFAULT;
491	PL_curcop = &PL_compiling;	685	PL_curcop = &PL_compiling;
492	PL_in_eval = EVAL_NULL;	686	PL_in_eval = EVAL_NULL;
		687	PL_comppad = 0;
493	PL_curpm = 0;	688	PL_curpm = 0;
		689	PL_curpad = 0;
494	PL_localizing = 0;	690	PL_localizing = 0;
495	PL_dirty = 0;	691	PL_dirty = 0;
496	PL_restartop = 0;	692	PL_restartop = 0;
		693	PL_diehook = 0; hv_store (hv_sig, strpair ("__DIE__" ), SvREFCNT_inc (sv_diehook ), 0);
		694	PL_warnhook = 0; hv_store (hv_sig, strpair ("__WARN__"), SvREFCNT_inc (sv_warnhook), 0);
		695
		696	GvSV (PL_defgv) = newSV (0);
		697	GvAV (PL_defgv) = coro->args; coro->args = 0;
		698	GvSV (PL_errgv) = newSV (0);
		699	GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
		700	PL_rs = newSVsv (GvSV (irsgv));
		701	PL_defoutgv = (GV *)SvREFCNT_inc (stdoutgv);
497		702
498	{	703	{
499	dSP;	704	dSP;
500	LOGOP myop;	705	LOGOP myop;
501		706
502	/* I have no idea why this is needed, but it is */
503	PUSHMARK (SP);
504
505	SvREFCNT_dec (GvAV (PL_defgv));
506	GvAV (PL_defgv) = coro->args; coro->args = 0;
507
508	Zero (&myop, 1, LOGOP);	707	Zero (&myop, 1, LOGOP);
509	myop.op_next = Nullop;	708	myop.op_next = Nullop;
510	myop.op_flags = OPf_WANT_VOID;	709	myop.op_flags = OPf_WANT_VOID;
511		710
		711	PUSHMARK (SP);
		712	XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv))));
		713	PUTBACK;
512	PL_op = (OP *)&myop;	714	PL_op = (OP *)&myop;
513
514	PUSHMARK (SP);
515	XPUSHs ((SV *)get_cv ("Coro::State::_coro_init", FALSE));
516	PUTBACK;
517	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);	715	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
518	SPAGAIN;	716	SPAGAIN;
		717
		718	/*
		719	* now its very tricky. the "tail" of the next transfer might end up
		720	* either in a new cctx, or an existing one.
		721	* in case of an existing one we have to take care of whatever
		722	* entersub and transfer do to the perl stack.
		723	*/
		724	ENTER;
		725	EXTEND (SP, 4);
		726	PUSHs ((SV *)0); /* items */
		727	PUSHs ((SV *)0); /* ix, set_stacklevel */
		728	PUSHs ((SV *)(sp - PL_stack_base + 1)); /* ax */
		729	PUSHs ((SV *)0); /* again */
		730	PUTBACK;
519	}	731	}
520
521	ENTER; /* necessary e.g. for dounwind */
522	}	732	}
523		733
524	static void	734	static void
		735	coro_destroy (pTHX_ struct coro *coro)
		736	{
		737	if (!IN_DESTRUCT)
		738	{
		739	/* restore all saved variables and stuff */
		740	LEAVE_SCOPE (0);
		741	assert (PL_tmps_floor == -1);
		742
		743	/* free all temporaries */
		744	FREETMPS;
		745	assert (PL_tmps_ix == -1);
		746
		747	/* unwind all extra stacks */
		748	POPSTACK_TO (PL_mainstack);
		749
		750	/* unwind main stack */
		751	dounwind (-1);
		752	}
		753
		754	SvREFCNT_dec (GvSV (PL_defgv));
		755	SvREFCNT_dec (GvAV (PL_defgv));
		756	SvREFCNT_dec (GvSV (PL_errgv));
		757	SvREFCNT_dec (PL_defoutgv);
		758	SvREFCNT_dec (PL_rs);
		759	SvREFCNT_dec (GvSV (irsgv));
		760
		761	SvREFCNT_dec (PL_diehook);
		762	SvREFCNT_dec (PL_warnhook);
		763
		764	SvREFCNT_dec (coro->saved_deffh);
		765	SvREFCNT_dec (coro->throw);
		766
		767	coro_destroy_stacks (aTHX);
		768	}
		769
		770	static void
525	free_coro_mortal ()	771	free_coro_mortal (pTHX)
526	{	772	{
527	if (coro_mortal)	773	if (expect_true (coro_mortal))
528	{	774	{
529	SvREFCNT_dec (coro_mortal);	775	SvREFCNT_dec (coro_mortal);
530	coro_mortal = 0;	776	coro_mortal = 0;
531	}	777	}
532	}	778	}
533		779
		780	static int
		781	runops_trace (pTHX)
		782	{
		783	COP *oldcop = 0;
		784	int oldcxix = -2;
		785	struct coro *coro = SvSTATE (coro_current); /* trace cctx is tied to specific coro */
		786	coro_cctx *cctx = coro->cctx;
		787
		788	while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
		789	{
		790	PERL_ASYNC_CHECK ();
		791
		792	if (cctx->flags & CC_TRACE_ALL)
		793	{
		794	if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB)
		795	{
		796	PERL_CONTEXT *cx = &cxstack[cxstack_ix];
		797	SV **bot, **top;
		798	AV *av = newAV (); /* return values */
		799	SV **cb;
		800	dSP;
		801
		802	GV *gv = CvGV (cx->blk_sub.cv);
		803	SV *fullname = sv_2mortal (newSV (0));
		804	if (isGV (gv))
		805	gv_efullname3 (fullname, gv, 0);
		806
		807	bot = PL_stack_base + cx->blk_oldsp + 1;
		808	top = cx->blk_gimme == G_ARRAY ? SP + 1
		809	: cx->blk_gimme == G_SCALAR ? bot + 1
		810	: bot;
		811
		812	av_extend (av, top - bot);
		813	while (bot < top)
		814	av_push (av, SvREFCNT_inc (*bot++));
		815
		816	PL_runops = RUNOPS_DEFAULT;
		817	ENTER;
		818	SAVETMPS;
		819	EXTEND (SP, 3);
		820	PUSHMARK (SP);
		821	PUSHs (&PL_sv_no);
		822	PUSHs (fullname);
		823	PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
		824	PUTBACK;
		825	cb = hv_fetch ((HV *)SvRV (coro_current), strpair ("_trace_sub_cb"), 0);
		826	if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		827	SPAGAIN;
		828	FREETMPS;
		829	LEAVE;
		830	PL_runops = runops_trace;
		831	}
		832
		833	if (oldcop != PL_curcop)
		834	{
		835	oldcop = PL_curcop;
		836
		837	if (PL_curcop != &PL_compiling)
		838	{
		839	SV **cb;
		840
		841	if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB)
		842	{
		843	PERL_CONTEXT *cx = &cxstack[cxstack_ix];
		844
		845	if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
		846	{
		847	runops_proc_t old_runops = PL_runops;
		848	dSP;
		849	GV *gv = CvGV (cx->blk_sub.cv);
		850	SV *fullname = sv_2mortal (newSV (0));
		851
		852	if (isGV (gv))
		853	gv_efullname3 (fullname, gv, 0);
		854
		855	PL_runops = RUNOPS_DEFAULT;
		856	ENTER;
		857	SAVETMPS;
		858	EXTEND (SP, 3);
		859	PUSHMARK (SP);
		860	PUSHs (&PL_sv_yes);
		861	PUSHs (fullname);
		862	PUSHs (cx->blk_sub.hasargs ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
		863	PUTBACK;
		864	cb = hv_fetch ((HV *)SvRV (coro_current), strpair ("_trace_sub_cb"), 0);
		865	if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		866	SPAGAIN;
		867	FREETMPS;
		868	LEAVE;
		869	PL_runops = runops_trace;
		870	}
		871
		872	oldcxix = cxstack_ix;
		873	}
		874
		875	if (cctx->flags & CC_TRACE_LINE)
		876	{
		877	dSP;
		878
		879	PL_runops = RUNOPS_DEFAULT;
		880	ENTER;
		881	SAVETMPS;
		882	EXTEND (SP, 3);
		883	PL_runops = RUNOPS_DEFAULT;
		884	PUSHMARK (SP);
		885	PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
		886	PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
		887	PUTBACK;
		888	cb = hv_fetch ((HV *)SvRV (coro_current), strpair ("_trace_line_cb"), 0);
		889	if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		890	SPAGAIN;
		891	FREETMPS;
		892	LEAVE;
		893	PL_runops = runops_trace;
		894	}
		895	}
		896	}
		897	}
		898	}
		899
		900	TAINT_NOT;
		901	return 0;
		902	}
		903
		904	/* inject a fake call to Coro::State::_cctx_init into the execution */
		905	/* _cctx_init should be careful, as it could be called at almost any time */
		906	/* during execution of a perl program */
534	static void NOINLINE	907	static void NOINLINE
535	prepare_cctx (coro_cctx *cctx)	908	cctx_prepare (pTHX_ coro_cctx *cctx)
536	{	909	{
537	dSP;	910	dSP;
538	LOGOP myop;	911	LOGOP myop;
539		912
		913	PL_top_env = &PL_start_env;
		914
		915	if (cctx->flags & CC_TRACE)
		916	PL_runops = runops_trace;
		917
540	Zero (&myop, 1, LOGOP);	918	Zero (&myop, 1, LOGOP);
541	myop.op_next = PL_op;	919	myop.op_next = PL_op;
542	myop.op_flags = OPf_WANT_VOID;	920	myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
543
544	sv_setiv (get_sv ("Coro::State::_cctx", FALSE), PTR2IV (cctx));
545		921
546	PUSHMARK (SP);	922	PUSHMARK (SP);
		923	EXTEND (SP, 2);
		924	PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));
547	XPUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));	925	PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
548	PUTBACK;	926	PUTBACK;
		927	PL_op = (OP *)&myop;
549	PL_restartop = PL_ppaddr[OP_ENTERSUB](aTHX);	928	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
550	SPAGAIN;	929	SPAGAIN;
551	}	930	}
552		931
		932	/*
		933	* this is a _very_ stripped down perl interpreter ;)
		934	*/
553	static void	935	static void
554	coro_run (void *arg)	936	cctx_run (void *arg)
555	{	937	{
		938	dTHX;
		939
556	/* coro_run is the alternative epilogue of transfer() */	940	/* cctx_run is the alternative tail of transfer(), so unlock here. */
557	UNLOCK;	941	UNLOCK;
558		942
		943	/* we now skip the entersub that lead to transfer() */
		944	PL_op = PL_op->op_next;
		945
		946	/* inject a fake subroutine call to cctx_init */
		947	cctx_prepare (aTHX_ (coro_cctx *)arg);
		948
		949	/* somebody or something will hit me for both perl_run and PL_restartop */
		950	PL_restartop = PL_op;
		951	perl_run (PL_curinterp);
		952
559	/*	953	/*
560	* this is a _very_ stripped down perl interpreter ;)	954	* If perl-run returns we assume exit() was being called or the coro
		955	* fell off the end, which seems to be the only valid (non-bug)
		956	* reason for perl_run to return. We try to exit by jumping to the
		957	* bootstrap-time "top" top_env, as we cannot restore the "main"
		958	* coroutine as Coro has no such concept
561	*/	959	*/
562	PL_top_env = &PL_start_env;	960	PL_top_env = main_top_env;
563		961	JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
564	/* inject call to cctx_init */
565	prepare_cctx ((coro_cctx *)arg);
566
567	/* somebody will hit me for both perl_run and PL_restartop */
568	perl_run (PL_curinterp);
569
570	fputs ("FATAL: C coroutine fell over the edge of the world, aborting. Did you call exit in a coroutine?\n", stderr);
571	abort ();
572	}	962	}
573		963
574	static coro_cctx *	964	static coro_cctx *
575	cctx_new ()	965	cctx_new ()
576	{	966	{
577	coro_cctx *cctx;	967	coro_cctx *cctx;
		968	void *stack_start;
		969	size_t stack_size;
578		970
579	++cctx_count;	971	++cctx_count;
580		972
581	New (0, cctx, 1, coro_cctx);	973	Newz (0, cctx, 1, coro_cctx);
582		974
583	#if HAVE_MMAP	975	#if HAVE_MMAP
584
585	cctx->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE;	976	cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
586	/* mmap suppsedly does allocate-on-write for us */	977	/* mmap supposedly does allocate-on-write for us */
587	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);	978	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
588		979
589	if (cctx->sptr == (void *)-1)	980	if (cctx->sptr != (void *)-1)
590	{
591	perror ("FATAL: unable to mmap stack for coroutine");
592	_exit (EXIT_FAILURE);
593	}	981	{
594
595	# if STACKGUARD	982	# if CORO_STACKGUARD
596	mprotect (cctx->sptr, STACKGUARD * PAGESIZE, PROT_NONE);	983	mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
597	# endif	984	# endif
		985	stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr;
		986	stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
		987	cctx->flags |= CC_MAPPED;
		988	}
		989	else
		990	#endif
		991	{
		992	cctx->ssize = coro_stacksize * (long)sizeof (long);
		993	New (0, cctx->sptr, coro_stacksize, long);
598		994
599	#else
600
601	cctx->ssize = STACKSIZE * (long)sizeof (long);
602	New (0, cctx->sptr, STACKSIZE, long);
603
604	if (!cctx->sptr)	995	if (!cctx->sptr)
605	{	996	{
606	perror ("FATAL: unable to malloc stack for coroutine");	997	perror ("FATAL: unable to allocate stack for coroutine");
607	_exit (EXIT_FAILURE);	998	_exit (EXIT_FAILURE);
608	}	999	}
609		1000
610	#endif	1001	stack_start = cctx->sptr;
		1002	stack_size = cctx->ssize;
		1003	}
611		1004
612	#if USE_VALGRIND	1005	REGISTER_STACK (cctx, (char *)stack_start, (char *)stack_start + stack_size);
613	cctx->valgrind_id = VALGRIND_STACK_REGISTER (	1006	coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
614	STACKGUARD * PAGESIZE + (char *)cctx->sptr,
615	cctx->ssize + (char *)cctx->sptr
616	);
617	#endif
618
619	coro_create (&cctx->cctx, coro_run, (void *)cctx, cctx->sptr, cctx->ssize);
620		1007
621	return cctx;	1008	return cctx;
622	}	1009	}
623		1010
624	static void	1011	static void
…		…
627	if (!cctx)	1014	if (!cctx)
628	return;	1015	return;
629		1016
630	--cctx_count;	1017	--cctx_count;
631		1018
632	#if USE_VALGRIND	1019	#if CORO_USE_VALGRIND
633	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);	1020	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
634	#endif	1021	#endif
635		1022
636	#if HAVE_MMAP	1023	#if HAVE_MMAP
		1024	if (cctx->flags & CC_MAPPED)
637	munmap (cctx->sptr, cctx->ssize);	1025	munmap (cctx->sptr, cctx->ssize);
		1026	else
		1027	#endif
		1028	Safefree (cctx->sptr);
		1029
		1030	Safefree (cctx);
		1031	}
		1032
		1033	/* wether this cctx should be destructed */
		1034	#define CCTX_EXPIRED(cctx) ((cctx)->ssize < coro_stacksize || ((cctx)->flags & CC_NOREUSE))
		1035
		1036	static coro_cctx *
		1037	cctx_get (pTHX_ int gimme)
		1038	{
		1039	while (expect_true (cctx_first[gimme]))
		1040	{
		1041	coro_cctx *cctx = cctx_first[gimme];
		1042	cctx_first[gimme] = cctx->next;
		1043	--cctx_idle[gimme];
		1044
		1045	if (expect_true (!CCTX_EXPIRED (cctx)))
		1046	return cctx;
		1047
		1048	cctx_destroy (cctx);
		1049	}
		1050
		1051	assert (!gimme);
		1052	return cctx_new ();
		1053	}
		1054
		1055	static void
		1056	cctx_put (coro_cctx *cctx, int gimme)
		1057	{
		1058	/* free another cctx if overlimit */
		1059	if (expect_false (cctx_idle[gimme] >= MAX_IDLE_CCTX))
		1060	{
		1061	coro_cctx *first = cctx_first[gimme];
		1062	cctx_first[gimme] = first->next;
		1063	--cctx_idle[gimme];
		1064
		1065	cctx_destroy (first);
		1066	}
		1067
		1068	++cctx_idle[gimme];
		1069	cctx->next = cctx_first[gimme];
		1070	cctx_first[gimme] = cctx;
		1071	}
		1072
		1073	/** coroutine switching *****************************************************/
		1074
		1075	static void
		1076	transfer_check (pTHX_ struct coro *prev, struct coro *next)
		1077	{
		1078	if (expect_true (prev != next))
		1079	{
		1080	if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
		1081	croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states");
		1082
		1083	if (expect_false (next->flags & CF_RUNNING))
		1084	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
		1085
		1086	if (expect_false (next->flags & CF_DESTROYED))
		1087	croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
		1088
		1089	if (
		1090	#if PERL_VERSION_ATLEAST (5,9,0)
		1091	expect_false (PL_parser)
638	#else	1092	#else
639	Safefree (cctx->sptr);	1093	expect_false (PL_lex_state != LEX_NOTPARSING)
640	#endif	1094	#endif
641		1095	)
642	Safefree (cctx);	1096	croak ("Coro::State::transfer called while parsing, but this is not supported");
643	}
644
645	static coro_cctx *
646	cctx_get ()
647	{
648	coro_cctx *cctx;
649
650	if (cctx_first)
651	{
652	cctx = cctx_first;
653	cctx_first = cctx->next;
654	--cctx_idle;
655	}
656	else
657	{
658	cctx = cctx_new ();
659	PL_op = PL_op->op_next;
660	}	1097	}
661
662	return cctx;
663	}	1098	}
664		1099
665	static void	1100	/* always use the TRANSFER macro */
666	cctx_put (coro_cctx *cctx)
667	{
668	/* free another cctx if overlimit */
669	if (cctx_idle >= MAX_IDLE_CCTX)
670	{
671	coro_cctx *first = cctx_first;
672	cctx_first = first->next;
673	--cctx_idle;
674
675	assert (!first->inuse);
676	cctx_destroy (first);
677	}
678
679	++cctx_idle;
680	cctx->next = cctx_first;
681	cctx_first = cctx;
682	}
683
684	/* never call directly, always through the coro_state_transfer global variable */
685	static void NOINLINE	1101	static void NOINLINE
686	transfer (struct coro *prev, struct coro *next, int flags)	1102	transfer (pTHX_ struct coro *prev, struct coro *next)
687	{	1103	{
688	dSTACKLEVEL;	1104	dSTACKLEVEL;
689		1105
690	/* sometimes transfer is only called to set idle_sp */	1106	/* sometimes transfer is only called to set idle_sp */
691	if (flags == TRANSFER_SET_STACKLEVEL)	1107	if (expect_false (!next))
		1108	{
692	((coro_cctx *)prev)->idle_sp = STACKLEVEL;	1109	((coro_cctx *)prev)->idle_sp = STACKLEVEL;
		1110	assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
		1111	}
693	else if (prev != next)	1112	else if (expect_true (prev != next))
694	{	1113	{
695	coro_cctx *prev__cctx;	1114	coro_cctx *prev__cctx;
696		1115
697	if (prev->flags & CF_NEW)	1116	if (expect_false (prev->flags & CF_NEW))
698	{	1117	{
699	/* create a new empty context */	1118	/* create a new empty context */
700	Newz (0, prev->cctx, 1, coro_cctx);	1119	Newz (0, prev->cctx, 1, coro_cctx);
701	prev->cctx->inuse = 1;
702	prev->flags &= ~CF_NEW;	1120	prev->flags &= ~CF_NEW;
703	prev->flags |= CF_RUNNING;	1121	prev->flags |= CF_RUNNING;
704	}	1122	}
705		1123
706	/*TODO: must not croak here */
707	if (!prev->flags & CF_RUNNING)
708	croak ("Coro::State::transfer called with non-running prev Coro::State, but can only transfer from running states");
709
710	if (next->flags & CF_RUNNING)
711	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
712
713	prev->flags &= ~CF_RUNNING;	1124	prev->flags &= ~CF_RUNNING;
714	next->flags |= CF_RUNNING;	1125	next->flags |= CF_RUNNING;
715		1126
716	LOCK;	1127	LOCK;
717		1128
718	if (next->flags & CF_NEW)	1129	if (expect_false (next->flags & CF_NEW))
719	{	1130	{
720	/* need to start coroutine */	1131	/* need to start coroutine */
721	next->flags &= ~CF_NEW;	1132	next->flags &= ~CF_NEW;
722	/* first get rid of the old state */	1133	/* first get rid of the old state */
723	SAVE (prev, -1);	1134	save_perl (aTHX_ prev);
724	/* setup coroutine call */	1135	/* setup coroutine call */
725	setup_coro (next);	1136	coro_setup (aTHX_ next);
726	/* need a new stack */
727	assert (!next->stack);
728	}	1137	}
729	else	1138	else
730	{	1139	{
731	/* coroutine already started */	1140	/* coroutine already started */
732	SAVE (prev, flags);	1141	save_perl (aTHX_ prev);
733	LOAD (next);	1142	load_perl (aTHX_ next);
734	}	1143	}
735		1144
736	prev__cctx = prev->cctx;	1145	prev__cctx = prev->cctx;
737		1146
738	/* possibly "free" the cctx */	1147	/* possibly "free" the cctx */
739	if (prev__cctx->idle_sp == STACKLEVEL && 0)	1148	if (expect_true (prev__cctx->idle_sp == STACKLEVEL && !(prev__cctx->flags & CC_TRACE)))
740	{	1149	{
741	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */	1150	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
742	assert (PL_top_env == prev__cctx->top_env);	1151	assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));
743		1152
744	prev->cctx = 0;	1153	prev->cctx = 0;
745		1154
		1155	/* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get */
		1156	/* without this the next cctx_get might destroy the prev__cctx while still in use */
		1157	if (expect_false (CCTX_EXPIRED (prev__cctx)))
		1158	if (!next->cctx)
		1159	next->cctx = cctx_get (aTHX_ next->gimme);
		1160
746	cctx_put (prev__cctx);	1161	cctx_put (prev__cctx, prev->gimme);
747	prev__cctx->inuse = 0;
748	}	1162	}
749		1163
		1164	++next->usecount;
		1165
750	if (!next->cctx)	1166	if (expect_true (!next->cctx))
751	{
752	next->cctx = cctx_get ();	1167	next->cctx = cctx_get (aTHX_ next->gimme);
753	assert (!next->cctx->inuse);
754	next->cctx->inuse = 1;
755	}
756		1168
757	if (prev__cctx != next->cctx)	1169	if (expect_false (prev__cctx != next->cctx))
758	{	1170	{
759	prev__cctx->top_env = PL_top_env;	1171	prev__cctx->top_env = PL_top_env;
760	PL_top_env = next->cctx->top_env;	1172	PL_top_env = next->cctx->top_env;
761	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);	1173	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
762	}	1174	}
763		1175
764	free_coro_mortal ();	1176	free_coro_mortal (aTHX);
765
766	UNLOCK;	1177	UNLOCK;
		1178
		1179	if (expect_false (prev->throw || next->throw))
		1180	{
		1181	struct coro *coro = SvSTATE (coro_current);
		1182
		1183	if (coro->throw)
		1184	{
		1185	SV *exception = coro->throw;
		1186	coro->throw = 0;
		1187	sv_setsv (ERRSV, exception);
		1188	croak (0);
		1189	}
		1190	}
767	}	1191	}
768	}	1192	}
769		1193
770	struct transfer_args	1194	struct transfer_args
771	{	1195	{
772	struct coro *prev, *next;	1196	struct coro *prev, *next;
773	int flags;
774	};	1197	};
775		1198
776	#define TRANSFER(ta) transfer ((ta).prev, (ta).next, (ta).flags)	1199	#define TRANSFER(ta) transfer (aTHX_ (ta).prev, (ta).next)
		1200	#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
777		1201
		1202	/** high level stuff ********************************************************/
		1203
778	static void	1204	static int
779	coro_state_destroy (struct coro *coro)	1205	coro_state_destroy (pTHX_ struct coro *coro)
780	{	1206	{
781	if (coro->refcnt--)	1207	if (coro->flags & CF_DESTROYED)
782	return;	1208	return 0;
		1209
		1210	coro->flags |= CF_DESTROYED;
		1211
		1212	if (coro->flags & CF_READY)
		1213	{
		1214	/* reduce nready, as destroying a ready coro effectively unreadies it */
		1215	/* alternative: look through all ready queues and remove the coro */
		1216	LOCK;
		1217	--coro_nready;
		1218	UNLOCK;
		1219	}
		1220	else
		1221	coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
783		1222
784	if (coro->mainstack && coro->mainstack != main_mainstack)	1223	if (coro->mainstack && coro->mainstack != main_mainstack)
785	{	1224	{
786	struct coro temp;	1225	struct coro temp;
787		1226
788	if (coro->flags & CF_RUNNING)	1227	if (coro->flags & CF_RUNNING)
789	croak ("FATAL: tried to destroy currently running coroutine");	1228	croak ("FATAL: tried to destroy currently running coroutine");
790		1229
791	SAVE ((&temp), TRANSFER_SAVE_ALL);	1230	save_perl (aTHX_ &temp);
792	LOAD (coro);	1231	load_perl (aTHX_ coro);
793		1232
794	coro_destroy_stacks ();	1233	coro_destroy (aTHX_ coro);
795		1234
796	LOAD ((&temp)); /* this will get rid of defsv etc.. */	1235	load_perl (aTHX_ &temp);
797		1236
798	coro->mainstack = 0;	1237	coro->slot = 0;
799	}	1238	}
800		1239
801	cctx_destroy (coro->cctx);	1240	cctx_destroy (coro->cctx);
802	SvREFCNT_dec (coro->args);	1241	SvREFCNT_dec (coro->args);
803	Safefree (coro);	1242
		1243	if (coro->next) coro->next->prev = coro->prev;
		1244	if (coro->prev) coro->prev->next = coro->next;
		1245	if (coro == coro_first) coro_first = coro->next;
		1246
		1247	return 1;
804	}	1248	}
805		1249
806	static int	1250	static int
807	coro_state_clear (pTHX_ SV *sv, MAGIC *mg)	1251	coro_state_free (pTHX_ SV *sv, MAGIC *mg)
808	{	1252	{
809	struct coro *coro = (struct coro *)mg->mg_ptr;	1253	struct coro *coro = (struct coro *)mg->mg_ptr;
810	mg->mg_ptr = 0;	1254	mg->mg_ptr = 0;
811		1255
		1256	coro->hv = 0;
		1257
		1258	if (--coro->refcnt < 0)
		1259	{
812	coro_state_destroy (coro);	1260	coro_state_destroy (aTHX_ coro);
		1261	Safefree (coro);
		1262	}
813		1263
814	return 0;	1264	return 0;
815	}	1265	}
816		1266
817	static int	1267	static int
…		…
824	return 0;	1274	return 0;
825	}	1275	}
826		1276
827	static MGVTBL coro_state_vtbl = {	1277	static MGVTBL coro_state_vtbl = {
828	0, 0, 0, 0,	1278	0, 0, 0, 0,
829	coro_state_clear,	1279	coro_state_free,
830	0,	1280	0,
831	#ifdef MGf_DUP	1281	#ifdef MGf_DUP
832	coro_state_dup,	1282	coro_state_dup,
833	#else	1283	#else
834	# define MGf_DUP 0	1284	# define MGf_DUP 0
835	#endif	1285	#endif
836	};	1286	};
837		1287
838	static struct coro *
839	SvSTATE (SV *coro)
840	{
841	HV *stash;
842	MAGIC *mg;
843
844	if (SvROK (coro))
845	coro = SvRV (coro);
846
847	stash = SvSTASH (coro);
848	if (stash != coro_stash && stash != coro_state_stash)
849	{
850	/* very slow, but rare, check */
851	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
852	croak ("Coro::State object required");
853	}
854
855	mg = SvMAGIC (coro);
856	assert (mg->mg_type == PERL_MAGIC_ext);
857	return (struct coro *)mg->mg_ptr;
858	}
859
860	static void	1288	static void
861	prepare_transfer (struct transfer_args *ta, SV *prev, SV *next, int flags)	1289	prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv)
862	{	1290	{
863	ta->prev = SvSTATE (prev);	1291	ta->prev = SvSTATE (prev_sv);
864	ta->next = SvSTATE (next);	1292	ta->next = SvSTATE (next_sv);
865	ta->flags = flags;	1293	TRANSFER_CHECK (*ta);
866	}	1294	}
867		1295
868	static void	1296	static void
869	api_transfer (SV *prev, SV *next, int flags)	1297	api_transfer (SV *prev_sv, SV *next_sv)
870	{	1298	{
		1299	dTHX;
871	struct transfer_args ta;	1300	struct transfer_args ta;
872		1301
873	prepare_transfer (&ta, prev, next, flags);	1302	prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
874	TRANSFER (ta);	1303	TRANSFER (ta);
875	}	1304	}
876		1305
877	/** Coro ********************************************************************/	1306	/** Coro ********************************************************************/
878		1307
879	#define PRIO_MAX 3
880	#define PRIO_HIGH 1
881	#define PRIO_NORMAL 0
882	#define PRIO_LOW -1
883	#define PRIO_IDLE -3
884	#define PRIO_MIN -4
885
886	/* for Coro.pm */
887	static SV *coro_current;
888	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
889	static int coro_nready;
890
891	static void	1308	static void
892	coro_enq (SV *coro_sv)	1309	coro_enq (pTHX_ SV *coro_sv)
893	{	1310	{
894	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);	1311	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
895	coro_nready++;
896	}	1312	}
897		1313
898	static SV *	1314	static SV *
899	coro_deq (int min_prio)	1315	coro_deq (pTHX_ int min_prio)
900	{	1316	{
901	int prio = PRIO_MAX - PRIO_MIN;	1317	int prio = PRIO_MAX - PRIO_MIN;
902		1318
903	min_prio -= PRIO_MIN;	1319	min_prio -= PRIO_MIN;
904	if (min_prio < 0)	1320	if (min_prio < 0)
905	min_prio = 0;	1321	min_prio = 0;
906		1322
907	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )	1323	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
908	if (AvFILLp (coro_ready [prio]) >= 0)	1324	if (AvFILLp (coro_ready [prio]) >= 0)
909	{
910	coro_nready--;
911	return av_shift (coro_ready [prio]);	1325	return av_shift (coro_ready [prio]);
912	}
913		1326
914	return 0;	1327	return 0;
915	}	1328	}
916		1329
917	static int	1330	static int
918	api_ready (SV *coro_sv)	1331	api_ready (SV *coro_sv)
919	{	1332	{
		1333	dTHX;
920	struct coro *coro;	1334	struct coro *coro;
921		1335
922	if (SvROK (coro_sv))	1336	if (SvROK (coro_sv))
923	coro_sv = SvRV (coro_sv);	1337	coro_sv = SvRV (coro_sv);
924		1338
925	coro = SvSTATE (coro_sv);	1339	coro = SvSTATE (coro_sv);
926		1340
927	if (coro->flags & CF_READY)	1341	if (coro->flags & CF_READY)
928	return 0;	1342	return 0;
929		1343
930	#if 0 /* this is actually harmless */
931	if (coro->flags & CF_RUNNING)
932	croak ("Coro::ready called on currently running coroutine");
933	#endif
934
935	coro->flags |= CF_READY;	1344	coro->flags |= CF_READY;
936		1345
937	LOCK;	1346	LOCK;
938	coro_enq (SvREFCNT_inc (coro_sv));	1347	coro_enq (aTHX_ SvREFCNT_inc (coro_sv));
		1348	++coro_nready;
939	UNLOCK;	1349	UNLOCK;
940		1350
941	return 1;	1351	return 1;
942	}	1352	}
943		1353
944	static int	1354	static int
945	api_is_ready (SV *coro_sv)	1355	api_is_ready (SV *coro_sv)
946	{	1356	{
		1357	dTHX;
947	return !!SvSTATE (coro_sv)->flags & CF_READY;	1358	return !!(SvSTATE (coro_sv)->flags & CF_READY);
948	}	1359	}
949		1360
950	static void	1361	static void
951	prepare_schedule (struct transfer_args *ta)	1362	prepare_schedule (pTHX_ struct transfer_args *ta)
952	{	1363	{
953	SV *prev, *next;	1364	SV *prev_sv, *next_sv;
954		1365
955	for (;;)	1366	for (;;)
956	{	1367	{
957	LOCK;	1368	LOCK;
958	next = coro_deq (PRIO_MIN);	1369	next_sv = coro_deq (aTHX_ PRIO_MIN);
		1370
		1371	/* nothing to schedule: call the idle handler */
		1372	if (expect_false (!next_sv))
		1373	{
		1374	dSP;
		1375	UNLOCK;
		1376
		1377	ENTER;
		1378	SAVETMPS;
		1379
		1380	PUSHMARK (SP);
		1381	PUTBACK;
		1382	call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
		1383
		1384	FREETMPS;
		1385	LEAVE;
		1386	continue;
		1387	}
		1388
		1389	ta->next = SvSTATE (next_sv);
		1390
		1391	/* cannot transfer to destroyed coros, skip and look for next */
		1392	if (expect_false (ta->next->flags & CF_DESTROYED))
		1393	{
		1394	UNLOCK;
		1395	SvREFCNT_dec (next_sv);
		1396	/* coro_nready is already taken care of by destroy */
		1397	continue;
		1398	}
		1399
		1400	--coro_nready;
959	UNLOCK;	1401	UNLOCK;
960
961	if (next)
962	break;	1402	break;
963
964	{
965	dSP;
966
967	ENTER;
968	SAVETMPS;
969
970	PUSHMARK (SP);
971	PUTBACK;
972	call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
973
974	FREETMPS;
975	LEAVE;
976	}	1403	}
977	}
978
979	prev = SvRV (coro_current);
980	SvRV_set (coro_current, next);
981		1404
982	/* free this only after the transfer */	1405	/* free this only after the transfer */
		1406	prev_sv = SvRV (coro_current);
		1407	ta->prev = SvSTATE (prev_sv);
		1408	TRANSFER_CHECK (*ta);
		1409	assert (ta->next->flags & CF_READY);
		1410	ta->next->flags &= ~CF_READY;
		1411	SvRV_set (coro_current, next_sv);
		1412
983	LOCK;	1413	LOCK;
984	free_coro_mortal ();	1414	free_coro_mortal (aTHX);
		1415	coro_mortal = prev_sv;
985	UNLOCK;	1416	UNLOCK;
986	coro_mortal = prev;
987
988	assert (!SvROK(prev));//D
989	assert (!SvROK(next));//D
990
991	ta->prev = SvSTATE (prev);
992	ta->next = SvSTATE (next);
993	ta->flags = TRANSFER_SAVE_ALL;
994
995	assert (ta->flags & CF_READY);
996	ta->next->flags &= ~CF_READY;
997	}	1417	}
998		1418
999	static void	1419	static void
1000	prepare_cede (struct transfer_args *ta)	1420	prepare_cede (pTHX_ struct transfer_args *ta)
1001	{	1421	{
1002	api_ready (coro_current);	1422	api_ready (coro_current);
1003
1004	prepare_schedule (ta);	1423	prepare_schedule (aTHX_ ta);
		1424	}
		1425
		1426	static int
		1427	prepare_cede_notself (pTHX_ struct transfer_args *ta)
		1428	{
		1429	if (coro_nready)
		1430	{
		1431	SV *prev = SvRV (coro_current);
		1432	prepare_schedule (aTHX_ ta);
		1433	api_ready (prev);
		1434	return 1;
		1435	}
		1436	else
		1437	return 0;
1005	}	1438	}
1006		1439
1007	static void	1440	static void
1008	api_schedule (void)	1441	api_schedule (void)
1009	{	1442	{
		1443	dTHX;
1010	struct transfer_args ta;	1444	struct transfer_args ta;
1011		1445
1012	prepare_schedule (&ta);	1446	prepare_schedule (aTHX_ &ta);
1013	TRANSFER (ta);	1447	TRANSFER (ta);
1014	}	1448	}
1015		1449
		1450	static int
		1451	api_cede (void)
		1452	{
		1453	dTHX;
		1454	struct transfer_args ta;
		1455
		1456	prepare_cede (aTHX_ &ta);
		1457
		1458	if (expect_true (ta.prev != ta.next))
		1459	{
		1460	TRANSFER (ta);
		1461	return 1;
		1462	}
		1463	else
		1464	return 0;
		1465	}
		1466
		1467	static int
		1468	api_cede_notself (void)
		1469	{
		1470	dTHX;
		1471	struct transfer_args ta;
		1472
		1473	if (prepare_cede_notself (aTHX_ &ta))
		1474	{
		1475	TRANSFER (ta);
		1476	return 1;
		1477	}
		1478	else
		1479	return 0;
		1480	}
		1481
1016	static void	1482	static void
1017	api_cede (void)	1483	api_trace (SV *coro_sv, int flags)
1018	{	1484	{
1019	struct transfer_args ta;	1485	dTHX;
		1486	struct coro *coro = SvSTATE (coro_sv);
1020		1487
1021	prepare_cede (&ta);	1488	if (flags & CC_TRACE)
1022	TRANSFER (ta);	1489	{
1023	}	1490	if (!coro->cctx)
		1491	coro->cctx = cctx_new ();
		1492	else if (!(coro->cctx->flags & CC_TRACE))
		1493	croak ("cannot enable tracing on coroutine with custom stack");
1024		1494
		1495	coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
		1496	}
		1497	else if (coro->cctx && coro->cctx->flags & CC_TRACE)
		1498	{
		1499	coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
		1500
		1501	if (coro->flags & CF_RUNNING)
		1502	PL_runops = RUNOPS_DEFAULT;
		1503	else
		1504	coro->slot->runops = RUNOPS_DEFAULT;
		1505	}
		1506	}
		1507
1025	MODULE = Coro::State PACKAGE = Coro::State	1508	MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
1026		1509
1027	PROTOTYPES: DISABLE	1510	PROTOTYPES: DISABLE
1028		1511
1029	BOOT:	1512	BOOT:
1030	{	1513	{
1031	#ifdef USE_ITHREADS	1514	#ifdef USE_ITHREADS
1032	MUTEX_INIT (&coro_mutex);	1515	MUTEX_INIT (&coro_mutex);
1033	#endif	1516	#endif
1034	BOOT_PAGESIZE;	1517	BOOT_PAGESIZE;
1035		1518
		1519	irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
		1520	stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
		1521
		1522	hv_sig = coro_get_hv ("SIG", TRUE);
		1523	sv_diehook = coro_get_sv ("Coro::State::DIEHOOK" , TRUE);
		1524	sv_warnhook = coro_get_sv ("Coro::State::WARNHOOK", TRUE);
		1525
		1526	if (!PL_diehook ) hv_store (hv_sig, strpair ("__DIE__" ), SvREFCNT_inc (sv_diehook ), 0);
		1527	if (!PL_warnhook) hv_store (hv_sig, strpair ("__WARN__"), SvREFCNT_inc (sv_warnhook), 0);
		1528
1036	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	1529	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
1037		1530
1038	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));	1531	newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
1039	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));	1532	newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
1040	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));	1533	newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
		1534	newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
1041		1535
1042	main_mainstack = PL_mainstack;	1536	main_mainstack = PL_mainstack;
		1537	main_top_env = PL_top_env;
		1538
		1539	while (main_top_env->je_prev)
		1540	main_top_env = main_top_env->je_prev;
1043		1541
1044	coroapi.ver = CORO_API_VERSION;	1542	coroapi.ver = CORO_API_VERSION;
1045	coroapi.transfer = api_transfer;	1543	coroapi.transfer = api_transfer;
1046		1544
1047	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));	1545	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
…		…
1054	struct coro *coro;	1552	struct coro *coro;
1055	HV *hv;	1553	HV *hv;
1056	int i;	1554	int i;
1057		1555
1058	Newz (0, coro, 1, struct coro);	1556	Newz (0, coro, 1, struct coro);
1059	coro->args = newAV ();	1557	coro->args = newAV ();
1060	coro->flags = CF_NEW;	1558	coro->flags = CF_NEW;
1061		1559
		1560	if (coro_first) coro_first->prev = coro;
		1561	coro->next = coro_first;
		1562	coro_first = coro;
		1563
1062	hv = newHV ();	1564	coro->hv = hv = newHV ();
1063	sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;	1565	sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;
1064	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));	1566	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1065		1567
		1568	av_extend (coro->args, items - 1);
1066	for (i = 1; i < items; i++)	1569	for (i = 1; i < items; i++)
1067	av_push (coro->args, newSVsv (ST (i)));	1570	av_push (coro->args, newSVsv (ST (i)));
1068	}	1571	}
1069	OUTPUT:	1572	OUTPUT:
1070	RETVAL	1573	RETVAL
1071		1574
		1575	# these not obviously related functions are all rolled into the same xs
		1576	# function to increase chances that they all will call transfer with the same
		1577	# stack offset
1072	void	1578	void
1073	_set_stacklevel (...)	1579	_set_stacklevel (...)
1074	ALIAS:	1580	ALIAS:
1075	Coro::State::transfer = 1	1581	Coro::State::transfer = 1
1076	Coro::schedule = 2	1582	Coro::schedule = 2
1077	Coro::cede = 3	1583	Coro::cede = 3
		1584	Coro::cede_notself = 4
		1585	Coro::Event::next = 5
		1586	Coro::Event::next_cancel = 6
1078	CODE:	1587	PPCODE:
1079	{	1588	{
1080	struct transfer_args ta;	1589	struct transfer_args ta;
		1590	int again = 0;
1081		1591
1082	switch (ix)	1592	do
1083	{	1593	{
		1594	switch (ix)
		1595	{
1084	case 0:	1596	case 0:
1085	ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));	1597	ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
1086	ta.next = 0;	1598	ta.next = 0;
1087	ta.flags = TRANSFER_SET_STACKLEVEL;
1088	break;	1599	break;
1089		1600
1090	case 1:	1601	case 1:
1091	if (items != 3)	1602	if (items != 2)
1092	croak ("Coro::State::transfer (prev,next,flags) expects three arguments, not %d", items);	1603	croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
1093		1604
1094	prepare_transfer (&ta, ST (0), ST (1), SvIV (ST (2)));	1605	prepare_transfer (aTHX_ &ta, ST(0), ST(1));
1095	break;	1606	break;
1096		1607
1097	case 2:	1608	case 2:
1098	prepare_schedule (&ta);	1609	prepare_schedule (aTHX_ &ta);
1099	break;	1610	break;
1100		1611
1101	case 3:	1612	case 3:
1102	prepare_cede (&ta);	1613	prepare_cede (aTHX_ &ta);
1103	break;	1614	break;
		1615
		1616	case 4:
		1617	if (!prepare_cede_notself (aTHX_ &ta))
		1618	XSRETURN_EMPTY;
		1619
		1620	break;
		1621
		1622	case 5:
		1623	case 6:
		1624	if (items != 1)
		1625	croak ("Coro::Event::next (watcher) expects one argument, not %d", items);
		1626
		1627	{
		1628	SV *ev = coroapi.coro_event_next (ST (0), ix == 6, GIMME_V != G_VOID);
		1629
		1630	if (ev)
		1631	{
		1632	if (GIMME_V != G_VOID)
		1633	{
		1634	XPUSHs (ev);
		1635	XSRETURN (1);
		1636	}
		1637	else
		1638	XSRETURN_EMPTY;
		1639	}
		1640	}
		1641
		1642	prepare_schedule (aTHX_ &ta);
		1643	again = 1;
		1644	break;
		1645	}
		1646
		1647	/* our caller, entersub, caches *only* this value */
		1648	ta.prev->gimme = GIMME_V == G_VOID ? 0
		1649	: GIMME_V == G_SCALAR ? 1
		1650	: 2;
		1651
		1652	/* we need to save all local variables, as we might execute a different coroutine when transfer returns */
		1653	sp += 2; /* save args */
		1654	EXTEND (SP, 4);
		1655	PUSHs ((SV *)(intptr_t)items);
		1656	PUSHs ((SV *)(intptr_t)ix);
		1657	PUSHs ((SV *)(intptr_t)ax);
		1658	PUSHs ((SV *)(intptr_t)again);
		1659	PUTBACK;
		1660	BARRIER;
		1661	TRANSFER (ta);
		1662	BARRIER;
		1663	SPAGAIN;
		1664	again = (intptr_t)POPs;
		1665	ax = (intptr_t)POPs;
		1666	ix = (intptr_t)POPs;
		1667	items = (intptr_t)POPs;
		1668	sp -= 2; /* restore args */
1104	}	1669	}
		1670	while (again);
1105		1671
1106	TRANSFER (ta);	1672	if (expect_false (GIMME_V != G_VOID && ta.next != ta.prev))
1107	}	1673	XSRETURN_YES;
1108		1674
1109	void	1675	XSRETURN_EMPTY; /* not understood why this is necessary, likely some stack handling bug */
1110	_clone_state_from (SV *dst, SV *src)	1676	}
		1677
		1678	bool
		1679	_destroy (SV *coro_sv)
1111	CODE:	1680	CODE:
1112	{	1681	RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1113	struct coro *coro_src = SvSTATE (src);	1682	OUTPUT:
1114		1683	RETVAL
1115	sv_unmagic (SvRV (dst), PERL_MAGIC_ext);
1116
1117	++coro_src->refcnt;
1118	sv_magicext (SvRV (dst), 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro_src, 0)->mg_flags |= MGf_DUP;
1119	}
1120		1684
1121	void	1685	void
1122	_exit (code)	1686	_exit (code)
1123	int code	1687	int code
1124	PROTOTYPE: $	1688	PROTOTYPE: $
1125	CODE:	1689	CODE:
1126	_exit (code);	1690	_exit (code);
1127		1691
1128	int	1692	int
		1693	cctx_stacksize (int new_stacksize = 0)
		1694	CODE:
		1695	RETVAL = coro_stacksize;
		1696	if (new_stacksize)
		1697	coro_stacksize = new_stacksize;
		1698	OUTPUT:
		1699	RETVAL
		1700
		1701	int
1129	cctx_count ()	1702	cctx_count ()
1130	CODE:	1703	CODE:
1131	RETVAL = cctx_count;	1704	RETVAL = cctx_count;
1132	OUTPUT:	1705	OUTPUT:
1133	RETVAL	1706	RETVAL
1134		1707
1135	int	1708	int
1136	cctx_idle ()	1709	cctx_idle ()
1137	CODE:	1710	CODE:
1138	RETVAL = cctx_idle;	1711	RETVAL = cctx_idle[0] + cctx_idle[1] + cctx_idle[2];
1139	OUTPUT:	1712	OUTPUT:
1140	RETVAL	1713	RETVAL
1141		1714
		1715	void
		1716	list ()
		1717	PPCODE:
		1718	{
		1719	struct coro *coro;
		1720	for (coro = coro_first; coro; coro = coro->next)
		1721	if (coro->hv)
		1722	XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
		1723	}
		1724
		1725	void
		1726	call (Coro::State coro, SV *coderef)
		1727	ALIAS:
		1728	eval = 1
		1729	CODE:
		1730	{
		1731	if (coro->mainstack)
		1732	{
		1733	struct coro temp;
		1734
		1735	if (!(coro->flags & CF_RUNNING))
		1736	{
		1737	save_perl (aTHX_ &temp);
		1738	load_perl (aTHX_ coro);
		1739	}
		1740
		1741	{
		1742	dSP;
		1743	ENTER;
		1744	SAVETMPS;
		1745	PUTBACK;
		1746	PUSHSTACK;
		1747	PUSHMARK (SP);
		1748
		1749	if (ix)
		1750	eval_sv (coderef, 0);
		1751	else
		1752	call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		1753
		1754	POPSTACK;
		1755	FREETMPS;
		1756	LEAVE;
		1757	}
		1758
		1759	if (!(coro->flags & CF_RUNNING))
		1760	{
		1761	save_perl (aTHX_ coro);
		1762	load_perl (aTHX_ &temp);
		1763	}
		1764	}
		1765	}
		1766
		1767	SV *
		1768	is_ready (Coro::State coro)
		1769	PROTOTYPE: $
		1770	ALIAS:
		1771	is_ready = CF_READY
		1772	is_running = CF_RUNNING
		1773	is_new = CF_NEW
		1774	is_destroyed = CF_DESTROYED
		1775	CODE:
		1776	RETVAL = boolSV (coro->flags & ix);
		1777	OUTPUT:
		1778	RETVAL
		1779
		1780	void
		1781	api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
		1782
		1783	SV *
		1784	has_stack (Coro::State coro)
		1785	PROTOTYPE: $
		1786	CODE:
		1787	RETVAL = boolSV (!!coro->cctx);
		1788	OUTPUT:
		1789	RETVAL
		1790
		1791	int
		1792	is_traced (Coro::State coro)
		1793	PROTOTYPE: $
		1794	CODE:
		1795	RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
		1796	OUTPUT:
		1797	RETVAL
		1798
		1799	IV
		1800	rss (Coro::State coro)
		1801	PROTOTYPE: $
		1802	ALIAS:
		1803	usecount = 1
		1804	CODE:
		1805	switch (ix)
		1806	{
		1807	case 0: RETVAL = coro_rss (aTHX_ coro); break;
		1808	case 1: RETVAL = coro->usecount; break;
		1809	}
		1810	OUTPUT:
		1811	RETVAL
		1812
		1813
1142	MODULE = Coro::State PACKAGE = Coro	1814	MODULE = Coro::State PACKAGE = Coro
1143		1815
1144	BOOT:	1816	BOOT:
1145	{	1817	{
1146	int i;	1818	int i;
1147		1819
		1820	sv_pool_rss = coro_get_sv ("Coro::POOL_RSS" , TRUE);
		1821	sv_pool_size = coro_get_sv ("Coro::POOL_SIZE" , TRUE);
		1822	av_async_pool = coro_get_av ("Coro::async_pool", TRUE);
		1823
		1824	coro_current = coro_get_sv ("Coro::current", FALSE);
		1825	SvREADONLY_on (coro_current);
		1826
1148	coro_stash = gv_stashpv ("Coro", TRUE);	1827	coro_stash = gv_stashpv ("Coro", TRUE);
1149		1828
1150	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));	1829	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1151	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));	1830	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1152	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1831	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1153	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));	1832	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1154	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1833	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1155	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));	1834	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1156		1835
1157	coro_current = get_sv ("Coro::current", FALSE);
1158	SvREADONLY_on (coro_current);
1159
1160	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	1836	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1161	coro_ready[i] = newAV ();	1837	coro_ready[i] = newAV ();
1162		1838
1163	{	1839	{
1164	SV *sv = perl_get_sv("Coro::API", 1);	1840	SV *sv = perl_get_sv ("Coro::API", TRUE);
		1841	perl_get_sv ("Coro::API", TRUE); /* silence 5.10 warning */
1165		1842
1166	coroapi.schedule = api_schedule;	1843	coroapi.schedule = api_schedule;
1167	coroapi.cede = api_cede;	1844	coroapi.cede = api_cede;
		1845	coroapi.cede_notself = api_cede_notself;
1168	coroapi.ready = api_ready;	1846	coroapi.ready = api_ready;
1169	coroapi.is_ready = api_is_ready;	1847	coroapi.is_ready = api_is_ready;
1170	coroapi.nready = &coro_nready;	1848	coroapi.nready = &coro_nready;
1171	coroapi.current = coro_current;	1849	coroapi.current = coro_current;
1172		1850
1173	GCoroAPI = &coroapi;	1851	GCoroAPI = &coroapi;
1174	sv_setiv (sv, (IV)&coroapi);	1852	sv_setiv (sv, (IV)&coroapi);
1175	SvREADONLY_on (sv);	1853	SvREADONLY_on (sv);
1176	}	1854	}
1177	}	1855	}
		1856
		1857	void
		1858	_set_current (SV *current)
		1859	PROTOTYPE: $
		1860	CODE:
		1861	SvREFCNT_dec (SvRV (coro_current));
		1862	SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));
1178		1863
1179	int	1864	int
1180	prio (Coro::State coro, int newprio = 0)	1865	prio (Coro::State coro, int newprio = 0)
1181	ALIAS:	1866	ALIAS:
1182	nice = 1	1867	nice = 1
…		…
1185	RETVAL = coro->prio;	1870	RETVAL = coro->prio;
1186		1871
1187	if (items > 1)	1872	if (items > 1)
1188	{	1873	{
1189	if (ix)	1874	if (ix)
1190	newprio += coro->prio;	1875	newprio = coro->prio - newprio;
1191		1876
1192	if (newprio < PRIO_MIN) newprio = PRIO_MIN;	1877	if (newprio < PRIO_MIN) newprio = PRIO_MIN;
1193	if (newprio > PRIO_MAX) newprio = PRIO_MAX;	1878	if (newprio > PRIO_MAX) newprio = PRIO_MAX;
1194		1879
1195	coro->prio = newprio;	1880	coro->prio = newprio;
1196	}	1881	}
1197	}	1882	}
		1883	OUTPUT:
		1884	RETVAL
1198		1885
1199	SV *	1886	SV *
1200	ready (SV *self)	1887	ready (SV *self)
1201	PROTOTYPE: $	1888	PROTOTYPE: $
1202	CODE:	1889	CODE:
1203	RETVAL = boolSV (api_ready (self));	1890	RETVAL = boolSV (api_ready (self));
1204	OUTPUT:	1891	OUTPUT:
1205	RETVAL	1892	RETVAL
1206		1893
1207	SV *
1208	is_ready (SV *self)
1209	PROTOTYPE: $
1210	CODE:
1211	RETVAL = boolSV (api_is_ready (self));
1212	OUTPUT:
1213	RETVAL
1214
1215	int	1894	int
1216	nready (...)	1895	nready (...)
1217	PROTOTYPE:	1896	PROTOTYPE:
1218	CODE:	1897	CODE:
1219	RETVAL = coro_nready;	1898	RETVAL = coro_nready;
1220	OUTPUT:	1899	OUTPUT:
1221	RETVAL	1900	RETVAL
1222		1901
1223	void	1902	void
1224	_set_current (SV *current)	1903	throw (Coro::State self, SV *throw = &PL_sv_undef)
1225	PROTOTYPE: $	1904	PROTOTYPE: $;$
		1905	CODE:
		1906	SvREFCNT_dec (self->throw);
		1907	self->throw = SvOK (throw) ? newSVsv (throw) : 0;
		1908
		1909	# for async_pool speedup
		1910	void
		1911	_pool_1 (SV *cb)
1226	CODE:	1912	CODE:
1227	SvREFCNT_dec (SvRV (coro_current));	1913	{
1228	SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));	1914	struct coro *coro = SvSTATE (coro_current);
		1915	HV *hv = (HV *)SvRV (coro_current);
		1916	AV *defav = GvAV (PL_defgv);
		1917	SV *invoke = hv_delete (hv, strpair ("_invoke"), 0);
		1918	AV *invoke_av;
		1919	int i, len;
		1920
		1921	if (!invoke)
		1922	croak ("\3async_pool terminate\2\n");
		1923
		1924	SvREFCNT_dec (coro->saved_deffh);
		1925	coro->saved_deffh = SvREFCNT_inc ((SV *)PL_defoutgv);
		1926
		1927	hv_store (hv, "desc", sizeof ("desc") - 1,
		1928	newSVpvn (strpair ("[async_pool]")), 0);
		1929
		1930	invoke_av = (AV *)SvRV (invoke);
		1931	len = av_len (invoke_av);
		1932
		1933	sv_setsv (cb, AvARRAY (invoke_av)[0]);
		1934
		1935	if (len > 0)
		1936	{
		1937	av_fill (defav, len - 1);
		1938	for (i = 0; i < len; ++i)
		1939	av_store (defav, i, SvREFCNT_inc (AvARRAY (invoke_av)[i + 1]));
		1940	}
		1941
		1942	SvREFCNT_dec (invoke);
		1943	}
		1944
		1945	void
		1946	_pool_2 (SV *cb)
		1947	CODE:
		1948	{
		1949	struct coro *coro = SvSTATE (coro_current);
		1950
		1951	sv_setsv (cb, &PL_sv_undef);
		1952
		1953	SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
		1954	coro->saved_deffh = 0;
		1955
		1956	if (coro_rss (aTHX_ coro) > SvIV (sv_pool_rss)
		1957	|| av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
		1958	croak ("\3async_pool terminate\2\n");
		1959
		1960	av_clear (GvAV (PL_defgv));
		1961	hv_store ((HV *)SvRV (coro_current), strpair ("desc"),
		1962	newSVpvn (strpair ("[async_pool idle]")), 0);
		1963
		1964	coro->prio = 0;
		1965
		1966	if (coro->cctx && (coro->cctx->flags & CC_TRACE))
		1967	api_trace (coro_current, 0);
		1968
		1969	av_push (av_async_pool, newSVsv (coro_current));
		1970	}
		1971
1229		1972
1230	MODULE = Coro::State PACKAGE = Coro::AIO	1973	MODULE = Coro::State PACKAGE = Coro::AIO
1231		1974
1232	SV *	1975	SV *
1233	_get_state ()	1976	_get_state ()
1234	CODE:	1977	CODE:
1235	{	1978	{
1236	struct {	1979	struct io_state *data;
1237	int errorno;
1238	int laststype;
1239	int laststatval;
1240	Stat_t statcache;
1241	} data;
1242		1980
		1981	RETVAL = newSV (sizeof (struct io_state));
		1982	data = (struct io_state *)SvPVX (RETVAL);
		1983	SvCUR_set (RETVAL, sizeof (struct io_state));
		1984	SvPOK_only (RETVAL);
		1985
1243	data.errorno = errno;	1986	data->errorno = errno;
1244	data.laststype = PL_laststype;	1987	data->laststype = PL_laststype;
1245	data.laststatval = PL_laststatval;	1988	data->laststatval = PL_laststatval;
1246	data.statcache = PL_statcache;	1989	data->statcache = PL_statcache;
1247
1248	RETVAL = newSVpvn ((char *)&data, sizeof data);
1249	}	1990	}
1250	OUTPUT:	1991	OUTPUT:
1251	RETVAL	1992	RETVAL
1252		1993
1253	void	1994	void
1254	_set_state (char *data_)	1995	_set_state (char *data_)
1255	PROTOTYPE: $	1996	PROTOTYPE: $
1256	CODE:	1997	CODE:
1257	{	1998	{
1258	struct {	1999	struct io_state *data = (void *)data_;
1259	int errorno;
1260	int laststype;
1261	int laststatval;
1262	Stat_t statcache;
1263	} *data = (void *)data_;
1264		2000
1265	errno = data->errorno;	2001	errno = data->errorno;
1266	PL_laststype = data->laststype;	2002	PL_laststype = data->laststype;
1267	PL_laststatval = data->laststatval;	2003	PL_laststatval = data->laststatval;
1268	PL_statcache = data->statcache;	2004	PL_statcache = data->statcache;
1269	}	2005	}
		2006

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